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This has been done for ages in the audio production space, it's called "convolution reverb". It's quite nice, but it doesn't allow you to tune it very much, besides basic filtering and stretching/cutting.

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Yah, they said "convolution reverb," so I think they expected audience to know what it was. Often it's not about creating new technology, but making existing technology accessible to new audiences and new creators.

Honestly, convolution reverb is already highly accessible. It’s a feature in $50 (and probably free) reverb plug-ins for anybody that does audio. They’re relatively easy to implement and have probably been around for a decade+. As the OP said, the audio things they mentioned aren’t new or adding any accessibility imo

They were doing it in the 80s for music when samplers first became big.

Yeah I figured so, but didn’t want to look up examples since I was on mobile and thus stuck with my more conservative value of decade+.

You have it right now in the browser Web Audio API, for free[1]

[1]: https://developer.mozilla.org/en-US/docs/Web/API/ConvolverNo...

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